Sash-lock.



PATENTED APR.' 28, 1908.

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W. G. ALLEN.

SASH LOCK.

APPLICATION FILED 00129, 1901.

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PA'TBN TED APR; 28, 1908.

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I TIE. 5- Ell-"1%- Elf-[2L5 WILLIAM G. ALLEN, OF SOUTH BETHLEHEM,PENNSYLVANIA.

SASH-LOCK.

Specification of Letters Patent.

Application filed October 29, 1907. Serial No. 399,639.

T 0 all whom it may concern:

Be it known that 1, WILLIAM G. ALLEN, a citizen of the United States,residing at South Bethlehem, in the county of Northampton and State ofPennsylvania, have invented certain new and useful Im rovements inSash-Locks, of which the folfbwing is a specification, reference beinghad to the accompanying drawings.

My invention relates to improvements in automatic sash locks andconsists of the novel features of construction and the combination andarrangement of parts hereinafter described and claimed.

The object of the invention is to provide a simple and practical lock ofthis character which will be automatic in its operation and which willeffectively fasten both of the sashes.

The above and other objects of the invention are attained in itspreferred embodiment illustrated in the accompanying drawings, in whichFigure 1 is a front elevation of one side of a window showing myimproved sash lock applied thereto; Fig. 2 is a vertical sectional viewthrough the same; Fig. 3 is a view of a ortion'of the window frameshowing the ocking pawl for the upper sash in elevation; Fig. 4 is asimilar view showing the locking pawl for the lower sash; Figs. 5 and 6are detail perspective views of the two locking pawls; Figs. 7 and 8 areperspective views of the two ratchet plates; and Fig. 9 is a similarview of the swinging plate or member carried by the lower ratchet plate.

In the drawings 1 denotes a portion of the window frame, 2 and 3 theupper and lower sashes, 4 a locking device for the upper sash adapted tobe controlled by the lower sash and 5 a locking device for the lowersash adapted to be manually controlled. The lock 4 which is adapted tobe automatically or self actuated to its locking position and to beretracted or unlocked by the upward movement of the lower sash 3,comprises a swinging dog or pawl 6 formed integral with a pivot 7 whichalso carries an arm 8. The pivot or journal 7 is mounted in a bearingrecess 8 formed in the lower portion of a recessed bearing plate'9 setin a recess in the frame 1 and secured by screws or the like 10. Therecess in the bearing plate 9 is of such size as to receive the pawl 6and the arm and said plate is so arranged in the frame 1 that said pawlis disposed opposite the edge of the upper sash 2 while the arm 8 isdisposed opposite the groove in the frame in which the lower sash 3slides. The pawl 6 is adapted to engage a ratchet 11 provided in theadjacent edge of the sash 2 and it is projected outwardly from the plate9 and into the ratchet by a leaf spring 12 secured upon its inner faceand adapted to bear against the bottom of the recess in the plate 9. Theratchet 1 1 may be simply a recess in the sash 2 but as shown itconsists of an angular metal plate secured in a recess by screws orsimilar fastenings 13. In the upper or free end of the pawl 6 Ipreferably journal an antifriction roller 14 and for the purpose oflimitin the outward swinging movement of the paw I provide its pivot 7with a stop lug 15 adapted to engage a shoulder 16 formed by. the bottomof the recess in the bearing plate 9 as clearly shown in Fig. 2.

The locking device 5 for the lower sash is Patented April 28, 1908.

automatically or self actuated to its locking position and adapted to beretracted or unlocked by hand, and it comprises a swinging locking pawl18 provided at one end with a pivot 19 and at its other end with aroller 20.

The pivot 19 is mountedin bearing recesses 21 formed in the upperportion of a recessed bearing plate 22 secured upon the inner face ofthe window frame 1 by screws or the like 23. The pawl 18 carries a leafspring 24 which actuates it outwardly as shown in Fig. 2. It will benoted that the pawl 18 and its bearing plate 22 are similar to the pawl6 and the bearing plate 9 but that these parts are in an invertedposition and the arm 8 is omitted from the pivot of the pawl. The pawl18 is adapted to enter a ratchet 25 formed in the adjacent edge of thelower sash 3 and preferably in the form of an angular metal platesecured in a recess in said sash by screws 26 and similar in shape tothe ratchet plate 11. The plate 25, however, is formed in its inclinedvertical portion with a slot 27 and also with a bearing 28, and in itslower horizontal portion with a slot 29 of slightly less width than theslot 27. Pivoted in the bearing 28 and arranged to swing within theangle of the plate 25 is a swinging member or plate 30 formed at itsupper end with a stop finger 31 and at its lower end with a similar finer 32. The finger or stop 31 is adapted to limit the inward swingingmovement of the plate 30 and the stop 32 which swings in the slot 29 isadapted to limit the outward movement of the same. The plate 30 hangsplate 22 by'a push rod 33 arranged for sliding movement in a bearingsleeve 34 set in the window sash 3 and secured by screws 35 passedthrough apertured ears on its outer end. The rod 33 has a finger pieceat its outer end and upon its inner end is a'washer head 36 whichretains it in the sleeve and is adapted to bear against the plate ormember 30.

In operation it will be seen that when the window sashes are in theirclosed positions the springs 12, 24, will force the locking pawls 6, 18outwardly into the ratchets 11, 25 and lock the sashes in such position.When it is desired. to open the window the push rod 33 is moved inwardlyto cause the swinging plate 30 to move the pawl 18 out of the ratchet 25and into the recessed plate 22 so that the lower sash may be readilyraised. As the latter moves upwardly its upper corner will engage thearm 8 on the pivot of the pawl 6 and force said arm, and consequentlythe pawl 6, inwardly into the plate 9, thereby releasing the upper sashwhich may be then raised or lowered as desired. When the two sashes aremoved to their closed positions the pawls will automatically lock them.

Having thus described my invention what I claim is:

1. The'combination with a window frame and a sash, of a verticallydisposed recessed bearing plate set in the frame and formed in the innerfaces of its opposite side walls, adj acent its top, with bearingrecesses, a spring projected pawl having pivots at its upper end toengage said bearing recesses, a ratchet plate set in the sash andadapted to receive the free lower end of the pawl, said ratchet platebeing angular and formed with a vertical slot, a swinging member pivotedat its upper end in the vertical slot in the ratchet plate, stops forlimiting the swinging movement of said member, a bearing sleeve in thesash and a push rod slidable in said sleeve and adapted to engage andactuate the free lower end of said member to cause the latter to retractthe pawl, substantially as set forth.

2. The combination with the frame and the upper and lower sashes of awindow, of a bearing plate set in the frame and having a recessed bodyand apertured attaching flanges, said recessed body being formed in itsopposing side walls with curved bearing recesses opening upon the frontface of the plate, a pivot reinovably arranged in said. curved bearingrecesses, a locking pawl projecting from said pivot adjacent to one endand adapted to enter a ratchet recess in the upper sash, a retractingarm projecting from said pivot adjacent to its other end and adapted toextend into the path of the lower sash, a spring for. projecting saidpawl, and means for securing the lower sash in its closed position.

3. The combination with the frame and the upper and lower sashes of awindow, of a bearing plate set in the frame and having opposing bearingrecesses in its side walls, a pivot arranged in said bearing recesses,an integral locking pawl formed upon said pivot and adapted to enter aratchet recess in the upper sash, an integral retracting arm formed uponsaid pivot and adapted to proj ect into the path of the lower sash, aspring for projecting said pawl, a second bearing plate set in the lowerpart of the frame, a spring projected locking pawl pivoted in the lastmentioned plate, a ratchet plate set in the lower sash and adapted toreceive the last mentioned pawl, a pivoted member in said ratchet plateadapted to engage said pivoted pawl and a push rod arranged in the lowersash and adapted to actuate the said pivolted member to retract saidpivoted paw In testimony whereof I hereunto affix my signature in thepresence of two witnesses.

WILLIAM G. ALLEN.

Witnesses:

W. B. Bone, HERBERT OASHN'ER.

